You are traveling with these? I hope you don't intend on using them on a plane since they are open and everyone around you can hear exactly what you are listening to. Everyone on the plane would hate you quick.

I got a Geekria case from Amazon that holds my similarly-sized HD598s pretty well, and it has a nice foam insert that cushions the and holds cables too. Even looks like carbon fiber (though it's actually plastic). It keeps them from getting crushed in a backpack at least. I'd check any reviews on Amazon since any case can be advertised for HD650s or whatever but may not actually fit them.